Here are the RMAA results for the iPod Classic (2009), the Samsung Galaxy Nexus, and the FiiO E7. The iPod was tested via it's Line Out Dock, as well as its headphone out, unloaded, and loaded with Sony MDR-XB700 headphones (24 ohms). The Galaxy Nexus and E7 were tested via their headphone out, loaded and unloaded. Here's a comparison between the 3, loaded with the headphones.

Audiophiles always say that the iPod's LOD outputs a "cleaner" signal than its headphone out; if I'm reading the values and graphs right, that seems correct. I couldn't say whether the difference is audible; one would have to also test the external headphone amplifier that would be connected to the LOD.

Overall the E7 seems superior, while the iPod is a pretty close second in some aspects, especially if you consider the LOD results. Of note is the significantly worse stereo crosstalk result from the Galaxy Nexus.

Edit: I used an old laptop for the recordings. I'm considering investing in a decent USB device. If I do get one, I'll run RMAA again.